package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.*;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.net.ssl.SSLEngineResult;
import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /*新增菜品和对应的口味*/
    @Override
    @Transactional //要么全成功要么全失败 保证方法是原子性的
    public void savewithFlavor(DishDTO dishDTO) {
        //向菜品表插入1条数据
        Dish dish=new Dish();
        //属性拷贝 将dto拷贝到dish 保证属性名一致
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId=dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dishId);});
            dishFlavorMapper.insertBatch(flavors);
        }
    }
/*菜品分页查询*/
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
          //开始分页查询 页码 每页记录数
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());

    }
   /*批量删除菜品 */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //是否能被删除--判断当前菜品是否是起售中 --只要有一个起售中 则不允许
        for(Long id:ids){
           Dish dish =dishMapper.getById(id);
           if(dish.getStatus()== StatusConstant.ENABLE)
           {   //当前菜品在售
               throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
           }
        }
       // 是否能被删除--判断是否被套餐关联
       List<Long> setmealIds=setmealDishMapper.getSetmealIdByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            //当前菜品被套餐关联了 不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //可以被删除 删除菜品数据
       /* for(Long id:ids){
             dishMapper.deleteById(id);
             //删除其关联的口味数据
                dishFlavorMapper.deleteByDishId(id);
        }*/
        //执行sql 语句越少越好 因此最好在sql中 foreach遍历 根据菜品id批量删除菜品和口味数据
        dishMapper.deleteByIds(ids);
          //根据菜品id批量删除菜品和口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }
    /* 根据id查询菜品及对应的口味数据*/
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish=dishMapper.getById(id);
        //根据id查询口味数据 一个菜品可能对应多个数据 因此返回值为list
        List<DishFlavor>dishFlavors=dishFlavorMapper.getByDishId(id);
        //进行封装到VO--属性拷贝和setFlavors
        DishVO dishVO=new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }
   /*修改菜品和对应的口味数据*/
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品的基本信息
        Dish dish=new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //口味-先删除再插入
        //删除原有的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入口味
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(dishFlavor -> {dishFlavor.setDishId(dishDTO.getId());});
            dishFlavorMapper.insertBatch(flavors);
        }


    }
 /*修改菜品状态-起售or停售 如果停售 则包含此菜品的套餐也需要停售*/
    @Override
    @Transactional
    public void updateStatus(Integer status, Long id) {
        Dish dish=Dish.builder().
                status(status).
                id(id).
                build();
        dishMapper.update(dish);
        if(status==StatusConstant.DISABLE)
        {   List<Long>dishIds=new ArrayList<>();
            dishIds.add(id);
           List<Long>setmealIds =setmealDishMapper.getSetmealIdByDishIds(dishIds);
           if(setmealIds!=null&&setmealIds.size()>0){
              for(Long setmealId:setmealIds){
                  Setmeal setmeal=Setmeal.builder().
                          status(status).
                          id(setmealId).
                          build();
                   setmealMapper.update(setmeal);
              }
           }
        }
    }
  /*查找一个分类id下对应的多个菜品*/
    @Override
    public List<Dish> getBycategoryId(Long categoryId) {
        Dish dish=Dish.builder().
                status(StatusConstant.ENABLE).
                categoryId(categoryId).
                build();

        List<Dish> dishList=dishMapper.getBycategoryId(dish);

        return dishList;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getBycategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
